body {
  overflow-x: hidden;
}

.header {
  background-color: #ffffff;
  padding: 10px 0;
  text-align: center;
  border-color: #ffffff;
  height: 100%;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.header .container {
  justify-content: space-between;
  align-items: center;
  max-width: 1440px;
  width: 100%;
  padding: 0;
  margin: 0 auto;
  display: flex;
}
.main-logo {
  height: 30px;
  width: 150px;
}

.nav {
  margin-right: 40px;
  margin-left: 40px;
  align-items: center;
  position: relative;
  display: flex;
}

.dropdown-content {
  display: none;
  position: absolute;
  justify-content: center;
  background-color: #ccc;
  border-left: 15px;
  width: 300px;
}

.dropdown {
  position: relative;
}

.dropdown:hover .dropdown-content {
  display: block;
  left: -30px;
  text-align: center;
  border-radius: 10px;
  padding-right: 30px;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 350px;
  background-color: #ccc;
  box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
  z-index: 1000000000;
  top: 100%;
}

.no-mp {
  padding: 0 !important;
  margin: 0 !important;
  flex-direction: row !important;
  justify-content: space-between !important;
  width: 100% !important;
}

.more-choices {
  display: flex;
  justify-content: center;
  align-items: center; /* 垂直居中 */
  flex-direction: row;
}

.lili {
  display: flex;
  border-radius: 10px;
  background-color: #ccc;
  align-items: center;
  justify-content: space-between;
}

.lili a {
  text-decoration: none;
  display: flex;
  height: 60px;
}

.lili:hover {
  background-color: #f9f9f9;
}
.nav button {
  border: none;
  background-color: #ffd38f;
  color: white;
  padding: 10px 20px;
}

.nav img {
  margin-left: 0px;
}

.nav-element {
  color: #5c5589;
  font-size: 20px;
  font-weight: 600;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 35px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: 0.4s;
  transition: 0.4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: #f7b000;
  -webkit-transition: 0.4s;
  transition: 0.4s;
  border-radius: 50%;
  box-shadow: inset 0 0 0 0 transparent;
}

input:checked + .slider {
  background-color: #3621f3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #3621f3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

.tooltip-container {
  position: relative;
  margin-left: 30px;
  display: flex;
}

.tooltip-button {
  align-items: center;
  background-clip: padding-box, border-box;
  background-image: linear-gradient(#130b43, #130b43),
    linear-gradient(#9e00ff, #20f);
  background-origin: border-box;
  border: 3px solid #4a2fe5;
  border-radius: 100px;
  color: #fbfcfe;
  display: flex;
  flex-wrap: nowrap;
  font-size: 16px;
  font-weight: 600;
  justify-content: center;
  line-height: 200%;
  padding-left: 16px;
  padding-right: 16px;
  position: relative;
}

.tooltip {
  position: absolute;
  top: 130%;
  /* 控制提示框距离按钮顶部的距离 */
  left: 20;
  background-color: #fffefe;
  color: #2e57e8;
  padding: 5px 10px;
  border: 1px solid #ffffff;
  border-radius: 5px;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
  display: none;
  width: 300px;
}

.gap-8 {
  gap: 8px;
  row-gap: 8px;
  column-gap: 8px;
  display: flex;
  align-items: center;
}

.auth-buttons {
  align-items: center;
  margin-left: 30px;
  justify-content: flex-end;
  display: flex;
}

.btn-p {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 32px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgb(19, 11, 67);
  border-radius: 5px;
  background-color: rgb(96, 79, 205);
  color: white;
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(var(--shadowColorMain), 0.2);
  transition: background-color 0.5s ease;
  margin-right: 20px;
}
.btn-p:hover {
  background-color: #130b43;
}

.btn-s {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 32px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgb(96, 79, 205);
  border-radius: 5px;
  background-color: rgb(255, 255, 255);
  color: rgb(96, 79, 205);
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(var(--shadowColorMain), 0.2);
  transition: background-color 0.5s ease;
  margin-right: 50px;
}
.btn-s:hover {
  background-color: rgb(221, 216, 247);
}

.btn-new1 {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 50px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgb(19, 11, 67);
  border-radius: 5px;
  background-color: rgb(96, 79, 205);
  color: white;
  text-decoration: none;
  box-shadow: 0 2px 4px rgb(204, 179, 245);
  transition: background-color 0.5s ease;
  margin-right: 20px;
}

.btn-new1:hover {
  background-color: rgb(58, 40, 174);
  transform: scale(1.1);
  transition: transform 0.5s ease;
}

.btn-new2 {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 50px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgb(96, 79, 205);
  border-radius: 5px;
  background-color: rgb(255, 255, 255);
  color: rgb(96, 79, 205);
  text-decoration: none;
  box-shadow: 0 2px 4px rgb(204, 179, 245);
  transition: background-color 0.5s ease;
}

.btn-new2:hover {
  background-color: rgb(221, 216, 247);
  transform: scale(1.1);
  transition: transform 0.5s ease;
}

.c-header {
  position: relative;
  width: 100%;
  height: 100%;
  background-image: url("../images/蜂巢背景.svg");
  background-blend-mode: normal, multiply;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  color: #333;
  font-size: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

/* 渐变背景 */
.c-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  background-image: linear-gradient(
    rgb(241, 240, 252) 0%,
    rgba(138, 43, 226, 0) 15%,
    transparent 85%,
    rgba(138, 43, 226, 0) 75%,
    rgb(241, 240, 252) 100% /* 紫色结束 */
  );
  mask-composite: exclude;
  /* 让鼠标事件穿过伪元素，可以点击按钮 */
  pointer-events: none;
  z-index: 1;
}

.exercises-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  background-image: linear-gradient(
    rgba(138, 43, 226, 0) 85%,
    rgb(241, 240, 252) 100% /* 紫色结束 */
  );
  mask-composite: exclude;
  /* 让鼠标事件穿过伪元素，可以点击按钮 */
  pointer-events: none;
}

.c-header .container {
  justify-content: space-between;
  align-items: center;
  max-width: 1440px;
  padding: 0;
  margin: 0 auto;
  display: flex;
}

.Sign {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  margin-bottom: 40px;
}

.intro {
  background-clip: border-box, padding-box;
  border: 2px solid transparent;
  background-color: rgb(250 250 255);
  background-image: linear-gradient(to right, #20f, #9e00ff);
  background-origin: border-box;
  border-radius: 8px;
  display: flex;
  box-shadow: 0px 4px 6px rgba(125, 110, 172, 0.1);
  max-width: 690px;
  position: relative;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  padding: 2px;
  margin-bottom: 32px;
}

.left-div-p {
  font-size: 18px;
  margin-bottom: 24px;
}

.circle {
  position: absolute;
  display: flex;
  align-items: center; /* 垂直居中 */
  justify-content: center; /* 水平居中 */
  width: 50px; /* 圆形组件的直径 */
  height: 50px; /* 圆形组件的直径 */
  background-color: rgb(67, 20, 210); /* 圆形组件的背景颜色 */
  border-radius: 50%; /* 让元素呈现圆形 */
  top: 27%;
  transform: translate(0);
  right: -25px;
  font-size: 35px; /* 增大表情符号的大小 */
  margin-bottom: 100px;
}

.intro-div {
  display: flex;
  align-items: center;
  flex-direction: row;
  background-color: #e5e1e8;
  border-radius: 6px;
  padding: 8px;
}

.intro-p {
  margin-left: 8px;
  font-size: 16px;
  line-height: 160%;
  margin-bottom: 0;
  margin-top: 0;
  max-width: 680px;
  text-align: left;
}

.intro-a {
  align-items: center;
  color: #2e57e8;
  display: flex;
  font-size: 16px;
  font-weight: 600;
  line-height: 170%;
  margin-left: 40px;
  margin-right: 20px;
  text-decoration: inherit;
  width: 150px;
}

.intro-a:hover {
  transform: scale(1.1);
  transition: transform 0.3s ease-in-out;
}

.tracks-section {
  padding-top: 56px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  width: 100%;
  max-width: 1440px;
  padding-left: 32px;
  padding-right: 32px;
}

.lg-container {
  position: relative;
  display: flex;
  flex-direction: column;
  max-width: 1440px;
  padding: 0;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.section-header {
  position: relative;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  flex-direction: column;
  align-self: center;
}

.section-header-1 {
  margin-bottom: 20px;
  height: 80px;
  width: 80px;
  background-image: url("../images/background-3.svg");
  background-size: 100%;
  position: relative;
  display: grid;
  place-items: center;
}

.section-header-2 {
  max-width: 740px;
  text-align: center;
  font-size: 39px;
  line-height: 1.25;
  font-weight: 700;
  color: #130b43;
  margin: 0;
  display: block;
}

.section-header-3 {
  margin-bottom: 20px;
  margin-top: 20px;
  height: 28px;
  width: 124px;
  background-image: url("../images/background-4.svg");
  background-position: 50%;
  background-size: contain;
  background-repeat: no-repeat;
  border: 0;
}

.section-header-4 {
  font-size: 20px;
  line-height: 160%;
  margin: 0;
}

.langu {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 64px;
}

.track {
  align-items: center;
  display: flex;
  flex-direction: column;
  padding: 24px 8px;
  width: calc(100% / 6 - 16px);
  transition: transform 0.3s ease-in-out;
  color: inherit;
  text-decoration: inherit;
}

.section-header1 {
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 60%;
  height: auto;
}

.track:hover {
  /* 整体变大 */
  transform: scale(1.1);
  z-index: 1;
}

.li-img1 {
  height: 200px;
  margin-left: 50px;
}

.li-img2 {
  height: 150px;
}

.left-div {
  display: flex;
  flex-direction: column;
  /* 左侧对齐 */
  align-items: flex-start;
}

.left-div-p2 {
  text-align: left;
  padding: 0;
  margin: 0;
}

/* 转换键消失,下方footer转3*/
@media screen and (max-width: 1350px) {
  .switch {
    display: none;
  }
  .top-div {
    flex-direction: column;
    display: flex;
    align-items: center;
  }
  .all-show {
    width: 100% !important;
    margin: 0 !important;
  }
}

/*语言转四 */
@media screen and (max-width: 1250px) {
  .main-logo {
    width: 30px;
  }
  .track {
    width: calc(100% / 4 - 16px);
  }
  .langu {
    margin-left: 50px;
    margin-right: 50px;
  }
}
/* 转换按钮出现，下拉栏消失 */
@media screen and (max-width: 1200px) {
  .li-img1 {
    height: 150px;
  }
  .li-img2 {
    height: 150px;
  }
  .dropdown.nav {
    display: none;
  }
  .switch {
    display: flex;
  }
  .section-header1 {
    flex-direction: column;
  }
  /* 导航栏置顶 */
  .Fix {
    position: sticky;
    top: 0;
    z-index: 999;
    width: 100%;
  }
}
/* 第二栏居中，右侧图片消失 */
@media screen and (max-width: 1050px) {
  .right-img {
    display: none;
  }
  .left-div {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }
  .left-div-p {
    margin-left: 50px;
    margin-right: 50px;
  }
  .left-div h1 {
    margin-left: 40px;
    margin-right: 40px;
  }
  .section-header {
    align-items: center;
  }
}

@media screen and (max-width: 1100px) {
  .li-img1 {
    display: none;
  }
  .li-img2 {
    display: none;
  }
}
/* 语言转2 */
@media screen and (max-width: 1000px) {
  .track {
    width: calc(100% / 2 - 16px);
  }
  .footer-top {
    flex-direction: column;
  }
}

@media screen {
  .section-header1 {
    width: 50%;
  }
}

@media screen and (max-width: 800px) {
  .intro-div {
    flex-direction: column;
    /* 内容左侧对齐 */
    align-items: flex-start;
  }
  .intro-div {
    margin-left: 0 !important;
  }
  .intro-p {
    margin: 0;
  }
  .intro-a {
    margin: 0;
  }
  .circle {
    top: 100%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  .switch {
    display: none;
  }
  .features {
    flex-direction: column;
  }
  .section-header1 {
    width: 40%;
  }
}

@media screen and (max-width: 650px) {
  .footer-top-left {
    width: 300px !important;
  }
}

@media screen and (max-width: 600px) {
  .section-header-2 {
    width: 400px;
  }
  .intro-p {
    width: 300px;
  }
  .no-mp {
    flex-direction: column !important;
    /* 左端对齐 */
    align-items: flex-start !important;
  }
  .More-d {
    padding-left: 0;
    margin-left: 0;
  }
  .section-header1 {
    width: 30%;
  }
}

@media screen and (max-width: 450px) {
  .section-header1 {
    width: 20%;
  }
  .intro-p {
    width: 250px;
  }
}

.right-div {
  margin-bottom: 0px;
  display: flex;
  display: grid;
  max-width: 530px;
}

.track .title {
  color: var(--textColor1);
  font-family: Source Code Pro, monospace;
  font-size: 20px;
  font-weight: 700;
  line-height: 140%;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-decoration: inherit;
}

.track-icon {
  filter: drop-shadow(0px 4px 4px rgba(0, 0, 0, 0.25));
  margin-bottom: 12px;
  flex-shrink: 0;
  width: 80px;
  height: 80px;
}

.cta {
  display: grid;
  place-items: center;
  background-color: rgb(176, 190, 216);
  height: 5px;
  width: 1440px;
}

.c-link {
  margin-top: -20px;
  border-radius: 100px;
  justify-content: center;
  display: flex;
  padding: 8px 24px;
  background: rgb(176, 190, 216);
  color: rgb(70, 123, 220);
  font-weight: 700;
  font-size: 16px;
  line-height: 170%;
  text-decoration: inherit;
}

.exercises-section {
  padding-bottom: 64px;
  padding-top: 10px;
  width: 100%;
  height: 100%;
  position: relative;
}

.top-div {
  display: flex;
}

.top-left-div {
  display: block;
  margin-right: auto;
  margin-left: 20px;
}

.all-show {
  box-shadow: #eae3ef 4px 4px 15px 10px;
  margin-left: 80px;
  margin-top: 100px;
  width: 700px;
}

.left {
  display: flex;
  align-items: flex-start;
}

.c-divider {
  margin-top: 20px;
  margin-bottom: 20px;
  background-image: url(../images/background-4.svg);
  height: 20px;
  width: 75px;
  margin: 24px 0 24px;
  color: inherit;
  box-sizing: border-box;
  border: none;
}

.exercises {
  display: block;
}

.exercise {
  display: flex;
  margin-bottom: 20px;
  padding: 12px 32px 12px 24px;
  box-shadow: #eae3ef 4px 4px 15px 10px;
  border-radius: 8px;
  align-items: center;
}

.brain {
  height: 48px;
  margin-right: 24px;
  width: 48px;
  position: relative;
}

.img-box {
  display: flex;
  align-items: center;
  margin-left: 30px;
}

.example {
  margin-left: -20px;
  width: 40px;
  height: 40px;
  display: block;
}

.More-d {
  display: flex;
  align-items: center;
  padding-left: 15px;
  margin-left: 16px;
  color: #76709f;
  font-weight: 600;
}

.features {
  display: flex;
  margin-top: 70px;
  column-gap: 80px;
  align-items: flex-start;
  color: #76709f;
  font-weight: 600;
}

.feature {
  display: block;
  align-items: flex-start;
  text-align: left;
  /* 每个元素宽度相同 */
  flex: 1;
}

.footer-top {
  background-color: #271b72;
  padding-top: 48px;
  padding-bottom: 0;
  display: flex;
  text-align: center;
  justify-content: space-around;
  width: 100%;
  height: 100%;
  align-items: center;
}

.footer-bottom {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-direction: column;
}

.footer-top-more {
  justify-content: space-between;
  padding-top: 0;
  max-width: 1440px;
}

.footer-bottom-more {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 1440px;
}

.footer-top-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 600px;
}

.footer-top-right {
  margin-left: 24px;
  align-items: center;
  flex-direction: row;
  display: flex;
}

.sign-3 {
  box-shadow: 0 4px 7px rgb(79 114 205 / 40%);
  margin-right: 32px;
  margin-bottom: 0;
  border-radius: 10px;
  font-size: 18px;
  font-weight: 600;
  height: 56px;
  width: auto;
  padding-left: 24px;
  padding-right: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: rgb(96 79 205);
  border-color: rgb(19 11 67);
  border-width: 1px;
  color: white;
  text-decoration: inherit;
}

.Explore-3 {
  box-shadow: 0 4px 7px rgb(79 114 205 / 40%);
  color: white;
  border-radius: 10px;
  font-size: 18px;
  height: 56px;
  padding-left: 24px;
  padding-right: 24px;
  align-items: center;
  display: flex;
  justify-content: center;
  background-color: #271b72;
  font-weight: 600;
  border-color: rgb(92 85 137);
  border-width: 1px;
  text-decoration: inherit;
}

.sign-3:hover {
  background-color: rgb(80, 63, 196);
  transform: scale(1.1);
  transition: transform 0.5s ease;
}

.Explore-3:hover {
  background-color: #1c1069;
  transform: scale(1.1);
  transition: transform 0.5s ease;
}

.cols {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  width: 90%;
}

.col-n {
  flex-direction: column;
  align-items: center;
  display: flex;
  width: calc(100% / 6 - 16px);
}

.col-n-a {
  color: rgb(200 213 239);
  font-size: 16px;
  font-weight: 500;
  line-height: 150%;
  text-decoration: inherit;
}

.site-link {
  margin-top: 56px;
  max-width: 1380px;
  width: 100%;
  display: block;
}

.c-divider-2 {
  margin-top: 20px;
  margin-bottom: 20px;
  background-image: url(../images/background-4-2.png);
  background-size: cover;
  height: 15px;
  width: 75px;
  margin: 24px 0 24px;
  color: inherit;
  box-sizing: border-box;
  border: none;
}

.socials {
  align-items: center;
  display: flex;
  justify-content: center;
  margin-bottom: 56px;
  margin-top: 24px;
}

.icon-1 {
  background-color: #1da1f2;
  border-radius: 100%;
  display: flex;
  height: 48px;
  margin: 0 12px;
  width: 48px;
  justify-content: center;
  align-items: center;
}

.icon-2 {
  background-color: #4267b2;
  border-radius: 100%;
  display: flex;
  height: 48px;
  margin: 0 12px;
  width: 48px;
  justify-content: center;
  align-items: center;
}

.icon-3 {
  background-color: #6e82aa;
  border-radius: 100%;
  display: flex;
  height: 48px;
  margin: 0 12px;
  width: 48px;
  justify-content: center;
  align-items: center;
}

.icon {
  height: 24px;
  width: 24px;
  position: relative;
}

.legals {
  display: flex;
  flex-direction: row;
  margin: 32px 0 40px;
  width: 1200px;
}

#backToTopBtn {
  position: fixed; /*固定*/
  bottom: 20px;
  right: 20px;
  padding: 10px 10px;
  border-radius: 100%;
  border-color: purple;
  /* 图片设置为cover */
  background-size: cover;
  background-image: url(../images/上箭头.png);
  cursor: pointer; /*指针样式*/
  display: none; /* 默认不显示，将在滚动时显示 */
  z-index: 10;
}
